WO2019011250A1

WO2019011250A1 - High-water-content oily sludge high-efficient comprehensive utilization method and negative-pressure circular heat storage recovery system

Info

Publication number: WO2019011250A1
Application number: PCT/CN2018/095197
Authority: WO
Inventors: 李秉正; 李�一; 吴汕
Original assignee: 重庆盎瑞悦科技有限公司
Priority date: 2017-07-12
Filing date: 2018-07-10
Publication date: 2019-01-17

Abstract

A high-water-content oily sludge high-efficient comprehensive utilization method and a negative-pressure circular heat storage recovery system. The method and the system can be used to directly process oily sludge having a water content as high as 40-90% without requiring dewatering the sludge, and can recover crude oil in the oily sludge, thus improving the economic benefit of oily sludge processing; the method can recycle heat energy, thus greatly reducing processing cost; and secondary pollution is not generated, thus achieving high-efficiency, comprehensive-utilization, and clean processing of the oily sludge.

Description

High-efficiency comprehensive utilization method of oily sludge with high water content and negative pressure circulation heat storage recovery system

Technical field

The invention belongs to the technical field of comprehensive utilization treatment of solid waste and harmless resources, and particularly relates to an efficient comprehensive utilization method of oily sludge with high water content and a negative pressure circulation heat storage recovery system.

Background technique

Oily sludge, referred to as sludge, is solid waste generated during oil extraction, transportation, refining and oily wastewater treatment. The sludge produced by the refinery sewage treatment plant is mainly derived from the bottom of the grease trap and the scum of the flotation tank. Crude oil tank bottom mud, commonly known as "three muds", these sludges have different composition, usually with oil content between 10% and 50%, water content between 40% and 90%, high water content, and extremely difficult Dehydration makes it difficult to handle the "three muds".

At present, China's petrochemical enterprises produce a large amount of oily sludge every year. Due to the lack of proper treatment technology, the treatment of “three muds” is generally concentrated-settling and transferred to rural areas, which not only causes secondary pollution, but also makes oily. The oil resources in the sludge cannot be effectively utilized, resulting in certain economic losses. At present, the methods for treating oily sludge mainly include solvent extraction method, incineration method, biological treatment method and coking method. Among them, solvent extraction method has long processing time, high processing cost, and the technology is not mature enough, and is only suitable for high oil content. Oily sludge, low cost performance; biological treatment method generally has a long cycle, and can not recover crude oil, resulting in waste of petroleum resources; coking process involves the transformation of coking unit is more complicated, high cost, and less processing; current incineration method can not Direct treatment of oily sludge with high water content requires pretreatment steps such as dehydration, which increases the treatment process and cost. Because of the low oil content of “three muds”, it is necessary to add additional fuel oil to complete the incineration process when incineration, which greatly increases the number of sludges. The energy consumption of the refinery, such as 20-24 tons of “three muds” with a water content of 75-85% after dehydration in the domestic refinery, must add 1 ton of diesel oil as energy. Excessive energy consumption makes the refinery unable to Long-term maintenance operation, at present, many domestic manufacturers of incinerators are idle, in addition, there are still low heat recovery rate and serious secondary air pollution. Defects. Therefore, research on a high-efficiency, green, comprehensive utilization of high-water-containing oil-containing sludge has important environmental and economic benefits.

Summary of the invention

The object of the present invention is to provide an efficient and comprehensive utilization method of oily sludge with high water content, which can directly treat oily sludge with water content of 40%-90% and recover oily sludge without dehydration pretreatment. The crude oil in the middle improves the economic benefit of the sludge treatment; in addition, the method can recycle the heat energy, greatly reduce the treatment cost, and does not generate secondary pollution, and can realize the efficient and comprehensive synthesis of the oily sludge.

Use, clean treatment.

In order to achieve the above object, the present invention provides the following technical solutions:

An efficient and comprehensive utilization method for oily sludge with high water content, comprising the following steps:

Step 1: The oily sludge with a water content of 40%-90% and the crushed material of the crop, quicklime, biomass charcoal, and tempering agent according to the mass ratio of 60-80:5-10:3-5:0-10:2 Mixing a ratio of -10 to prepare a mixture, the crop crushing material is selected from the group consisting of clam shells having a particle size of 2-8 mm, straw and corn cob, etc., and the biomass carbon has a particle size of 1-8 mm and a calorific value of 4500. -6500 kcal, the tempering agent is a surfactant;

Step 2: The mixture obtained in the step 1 is sent to an incinerator of a negative pressure circulation heat storage recovery system, the mixture has a thickness of 350-700 mm, and the mixed traveling speed is 0-0.2 m/s, and the negative pressure is cyclically stored. The heat recovery system includes a mixing device (1), an incineration device (2), an exhaust device (3), a flue gas circulation device (4), an oil-water collecting device (5), a conveying device (6), and a flue gas cleaning device (7). , which is characterized by:

The mixing device (1) comprises a plurality of silos (11), a weighing scale (12), a mixing and agitating device (13), and the discharge port of the silo (11) is aligned with the weighing scale (12) The weighing plate of the weighing scale (12) corresponds to the feeding port of the mixing and stirring device (13), and the pulverized material of the crop, the quicklime, the biomass charcoal and the tempering agent in the silo (11) are metered ( 12) After weighing, it is sent to the mixing and agitating device (13) and mixed with the high water content oily sludge to obtain the mixture described in the first step, and the discharge port of the mixing and stirring device (13) is connected to the conveying device (6). The conveying device (6) is sent to the incinerator (2);

The incinerator (2) includes a cloth section (20), a drying section (21), an ignition section (22), an incineration section (23) and a cooling section (24) from front to back, and the cloth section (20) A material disperser (25) is provided, the drying section (21) has a length of 1-6 m, the ignition section (22) has a length of 1-3 m, and the ignition temperature is 850 ° C - 1050 ° C, which can prevent the mixture from being able to The defects of ignition can avoid the high energy consumption caused by excessive temperature and the defects of the surface layer melting affecting the gas permeability. The length of the incineration section (23) is 4-20m, and the temperature of the incineration section is 1100 °C, which can ensure the harmful substances can be obtained. Fully incineration, a preheating cover (26) from front to back from low to high is provided above the drying section (21) and the ignition section (22), and a preheating cover corresponding to the position of the ignition section (22) is provided. There is an exhaust gas inlet (27) and a fuel nozzle (28) to form a second combustion chamber for both drying and preheating the material, and further treating the exhaust gas, the drying section (21), the ignition section (22), and the incineration section ( 23) and the lower portion of the cooling section (24) is sealingly connected to the air extracting device (3), and the upper portion of the incineration section (23) is sealingly connected with the flue gas circulation system (4), and the mixture obtained in the step 1 is After the ignition section (22), after ignition, under the negative pressure generated by the air extracting device (3), the fire starts to burn downward from the upper part of the mixture, and the high-temperature steam generated by the upper combustion performs drying and preheating of the lower material on the one hand. On the other hand, the water and oil in the lower material are taken away, and the oil-water mixture brought out flows out from the bottom into the oil-water collecting device (5) under the action of gravity;

The air extracting device (3) includes a plurality of air hoods (31), and each of the air hoods (31) is connected to a set of exhaust pipes composed of an air exhaust pipe (32) and an air blower (33). An oil-water collecting device (5) is disposed between the pipe (32) and the exhaust fan (33), and a tail end of the exhaust pipe communicating with the lower portion of the drying section (21) communicates with the flue gas purification device (7), and The tail end of the exhaust pipe connecting the ignition section (22) and the incineration section (23) is connected to the flue gas circulation device (4), and the last stage exhaust pipe connected to the lower portion of the incineration section (23) The outlet is in communication with the exhaust gas inlet (27) of the preheating hood (26), and the exhausting conduit communicating with the lower portion of the cooling section (24) is connected to the tail dust removing device;

The flue gas circulation device (4) comprises a plurality of flue gas hoods (41), each of which is provided with an exhaust gas inlet (42) and a fresh air distribution inlet (43), the flue gas hood The exhaust gas inlet (42) of (41) is in communication with the tail end of the upper-stage exhausting pipe, and the flue gas formed by the decomposition of the harmful substances in the mixed material in the high-temperature incineration enters the exhaust pipe through the draft hood (31) (32) After the flue gas oil and water is separated and collected in the oil-water collecting device (5), the remaining flue gas is sent to the next-stage flue gas hood (41) through the exhaust fan (33) to complete the drying and preheating of the mixture material in the latter stage. The oil-water mixture brought out flows out from the bottom into the oil-water collecting device (5) under gravity, and the flue gas in the last-stage exhaust pipe communicating with the lower portion of the incineration section (23) enters the preheating through the exhaust gas inlet (27). After the cover (26), the secondary combustion in the second combustion chamber, after the advanced treatment, enters the flue gas purification device (7);

The oil-water collecting device (5) includes a cyclone type condensing oil remover (51) having an upper portion in a cylindrical shape and an inverted cone shape in a lower portion, and a spiral scraping oil plate is disposed inside the cyclone type condensing oil remover (51) ( 52), the outer wall is provided with a flue gas inlet (53) communicating with the tail end of the exhaust pipe (32), and the top is provided with a flue gas outlet (54) communicating with the exhaust gas inlet (42) of the flue gas hood (41), The bottom is connected with the oil water collector (55), and the flue gas and the oily liquid droplets enter the oil water collecting device (5) through the air exhaust pipe, and the liquid droplets are separated from the flue gas by the spiral oil scraping plate (52), and enter the oil water collector ( 55), the remaining flue gas enters the next-stage flue gas hood (41) through the flue gas outlet (54) to realize the recovery and utilization of petroleum;

The outlet pipe of the flue gas purification device (7) is connected to the chimney through an exhaust fan, and exhausts the purified exhaust gas.

According to the method of the present invention, the crop crushing material described in the step 1 is a clam shell having a particle diameter of 2-8 mm, and the mass ratio of the sludge, the clam shell, the quicklime, the biomass charcoal and the quenching agent is 60- 75:6-10:3-5:2-8:5-10.

The inventors have found that the ratio of oily sludge, crop crushed material, quicklime, biomass charcoal, and tempering agent has a great influence on the incineration effect of the mixture, when the above five are based on the mass ratio of 60-80:5-10: The ratio of 3-5:0-10:2-10, especially when mixed at a mass ratio of 60-75:6-10:3-5:2-8:5-10, the obtained mixture has good gas permeability, The calorific value is appropriate, the incineration rate is appropriate, the combustion is sufficient, and at the same time it provides a downstream passage for the oily droplets.

In addition, the particle size of the crop pulverized material and the biomass carbon granule also has a great influence on the properties of the mixture. When the particle size of the pulverized material of the crop or the particle size of the biomass carbon granule exceeds 8 mm, the prepared mixture has excellent gas permeability and incineration rate. Too fast, insufficient combustion; when the particle size of the crop crushed material is less than 2mm or the particle size of the biomass carbon particle is less than 1mm, the prepared mixture has poor gas permeability, the fan load is too large, the incineration is insufficient, and sufficient oil drops are not provided. The inventors have found through a large number of experiments that when the particle size of the crushed material of the crop is 2-8 mm or the particle size of the biomass carbon particle is 1-8 mm, the gas permeability of the obtained mixture can be ensured, and the combustion can be fully and can be Provide sufficient downflow channels for oily droplets.

According to the method of the present invention, the mixture described in step 2 has a thickness of from 500 to 700 mm.

The inventors have also found that when the mixture is fed to the incinerator of the negative pressure circulating heat storage recovery system, the thickness and the traveling speed also have a great influence on the incineration effect. When the thickness exceeds 700 mm or the traveling speed exceeds 0.2 m/s, the mixture is breathable. Insufficient in nature, unable to incinerate sufficiently, affecting the effect of incineration; if the thickness is less than 350mm, the heat storage effect of the mixture is poor, the incineration temperature is low, and the oil in the oily sludge cannot be sufficiently separated, and the oil recovery rate is low; only the mixture is controlled. When the thickness is 350-700mm and the traveling speed is 0-0.2m/s, it can ensure the incineration of the mixture is sufficient, and the oil in the mixture can be effectively recovered, which improves the economic benefit and treatment efficiency of the solid waste treatment, and ensures the system. Stable operation.

According to the method of the present invention, the fresh air distribution inlet of the flue gas device (4) described in the step 2 is provided with an air inlet regulating valve, and the opening amount of the fresh air is controlled by controlling the opening degree thereof.

The method of the invention utilizes the characteristics of the negative pressure circulating heat storage incinerator and adds a certain auxiliary material to realize the disposal of the oily sludge, which is characterized in that it can incinerate the harmful substances in the oily sludge, The incineration device is used to incinerate and preheat the oil, and the oil in the sludge is extracted to realize the recycling of the oil materials. The specific advantages are as follows:

1. Using negative pressure circulating heat storage recovery technology, effectively use the high temperature steam generated by the incineration of the upper layer material to dry and preheat the lower material. Since the lower material is wet material, under the action of the hot steam generated in the upper part, the mixture will be mixed. The water and oil are taken away, and the mixed steam of oil and water encounters the condensation of cold materials into oil droplets. The high temperature of the flue gas can also reduce the viscosity and increase the fluidity of the heavy oil. The droplets flow out from the bottom for uniform collection and greatly reduce energy consumption. And processing costs;

2. It can directly treat oily sludge with high water content and solve the problem of disposal of oily sludge with high water content;

3. The flue gas generated by incineration is recycled by the exhaust device and the flue gas device on the one hand, and in the sealed pipeline of the exhaust device and the flue gas device on the other hand, and finally enters the flue gas purification device after the deep treatment of the second combustion chamber. Can not achieve secondary pollution, can achieve clean production;

4. The multi-stage secondary combustion technology of flue gas is adopted, the harmful components in the gas are effectively treated, and the oxygen content of the exhaust gas is effectively utilized in the combustion process, thereby greatly reducing the amount of fresh air intake, thereby greatly reducing the total smoke emission. The amount can be reduced by more than 60% compared with the total amount of flue gas emissions from general incineration methods;

5. The discharged water, gas and slag all meet the national standards;

6. The sludge is reduced, harmless, and resourced to a high degree, and the effect is obvious;

7. Crude oil containing oil sludge can be recycled;

8. After the treated residue reaches the standard, the oil well can be backfilled.

DRAWINGS

1 is a schematic structural view of a negative pressure circulation heat storage recovery system of the present invention;

2 is a schematic structural view of a mixing device of a negative pressure circulating heat storage recovery system of the present invention;

3 is a negative pressure circulation heat storage recovery system incineration device, a draft device, a flue gas circulation device,

Schematic diagram of the oil-water collecting device and the flue gas cleaning device;

4 is a schematic structural view of a cyclone type degreaser of a negative pressure circulating heat storage recovery system of the present invention;

Figure 5 is a schematic view showing the principle of incineration of the mixture of the present invention;

Figure 6 is a flow chart of the method of the present invention;

In the picture,

1-mixing device, 11- silo, 12-meter weighing, 13-mixing tank;

2-incineration unit, 20-disc section, 21-dry section, 22-ignition section, 23-incineration section, 24-cooling section, 25-material disperser, 26-preheating hood, 27-exhaust gas inlet, 28- Fuel nozzle

3-exhaust device, 31-exhaust hood, 32-exhaust pipe, 33-exhaust fan;

4-flue gas circulation device, 41-flue gas hood, 42-exhaust gas inlet, 43- fresh air distribution inlet;

5-oil water collection device, 51-cyclone condensing degreaser, 52-spiral scraper, 53-flue gas inlet, 54-flue gas outlet, 55-oil water collector;

6-transfer device;

7-Fume purification device.

Detailed ways

Embodiment 1 Negative pressure circulation heat storage recovery system

As shown in FIGS. 1-6, the negative pressure circulating heat storage recovery system of the present invention comprises a mixing device 1, an incinerator 2, an exhaust device 3, a flue gas circulation device 4, an oil water collecting device 5, a conveying device 6, and a flue gas purification device. 7, the mixing device 1 comprises a plurality of silos 11, a weighing scale 12, a mixing and agitating device 13, the discharge port of the silo 11 is aligned with the weighing disc of the weighing scale 12, and the weighing is said to be 12 weighing The tray corresponds to the feed port of the mixing and stirring device 13, and the crop crushed material, quicklime, biomass charcoal and quenching agent in the silo 11 are weighed by weighing 12, and then sent to the mixing and stirring device 13 to contain oil with high water content. Mixing the sludge to obtain a mixture, and the discharge port of the mixing and stirring device 13 is connected to the conveying device 6, and sent to the incinerator 2 via the conveying device 6;

The incinerator 2 comprises, in order from front to back, a cloth section 20, a drying section 21, an ignition section 22, an incineration section 23 and a cooling section 24. The cloth section 20 is provided with a material disperser 25, and the drying section 21 The length is 1-20m, the length of the ignition section 22 is 1-6m, and the ignition temperature is 850°C-1050°C, which can avoid the defects that the mixture can not be ignited, and can avoid the high energy consumption caused by excessive temperature and the surface melting of the mixture. The defect of gas permeability, the length of the incineration section 23 is 4-50 m, and the temperature of the incineration section is 1100 ° C, which can ensure that the harmful substances can be fully incinerated, and the drying section 21 and the ignition section 22 are provided from the front to the rear by the low To the high preheating cover 26, the preheating cover corresponding to the position of the ignition section 22 is provided with an exhaust gas inlet 27 and a fuel nozzle 28 to form a second combustion chamber, which not only preheats the material but also deeply treats the exhaust gas. The lower portion of the drying section 21, the ignition section 22, the incineration section 23 and the cooling section 24 are sealingly connected to the air extracting device 3, and the upper portion of the incineration section 23 is sealingly connected to the flue gas circulation system 4, and the upper part of the mixture obtained in the step 1 is in the ignition section. 22 after ignition, produced in the exhaust device 3 Under the negative pressure, the fire starts to burn downward from the upper part of the mixture, and the high-temperature steam generated by the upper combustion performs drying and preheating of the lower material on the one hand, and carries away the water and oil in the lower material on the other hand. The oil-water mixture flows out from the bottom into the oil-water collecting device 5 under the action of gravity;

The air extracting device 3 includes a plurality of air hoods 31, and each of the air hoods 31 is connected to a set of exhaust pipes composed of an air exhaust pipe 32 and an air blower 33. The oil-water collecting device 5, the tail end of the exhaust duct communicating with the lower portion of the drying section 21 is in communication with the flue gas purifying device 7, and the tail end of the exhaust duct communicating with the ignition section 22 and the incineration section 23 is The flue gas circulation device 4 is connected, and the outlet of the last stage exhaust pipe communicating with the lower portion of the incineration section 23 communicates with the exhaust gas inlet 27 of the preheating cover 26, and the exhaust pipe and the tail dust removing device communicating with the lower portion of the cooling section 24 Connected

The flue gas circulation device 4 includes a plurality of flue gas hoods 41. Each of the flue gas hoods 41 is provided with an exhaust gas inlet 42 and a fresh air distribution inlet 43. The exhaust gas inlet 42 of the flue gas hood 41 is pumped with the upper stage. The tail end of the air duct is connected, and the flue gas formed by the decomposition of the harmful substances in the mixed material in the high temperature incineration enters the exhaust duct 32 through the exhaust hood 31, and the flue gas oil and water is separated and collected in the oil water collecting device 5, and the remaining flue gas The gas is sent to the next-stage flue gas hood 41 through the suction fan 33 to complete the drying and preheating of the mixture material in the latter stage, thereby realizing the transfer of heat energy, recycling the heat energy, improving the economic efficiency, and communicating with the lower portion of the incineration section 23. The flue gas in the last stage exhaust pipe enters the preheating cover 26 through the exhaust gas inlet 27, and is subjected to secondary combustion in the second combustion chamber, and after advanced treatment, enters the flue gas purifying device 7;

The oil-water collecting device 5 includes a cyclone type condensing oil remover 51 having an upper portion in a cylindrical shape and an inverted cone shape in the lower portion, and the inside of the cyclone type condensing oil remover 51 is provided with a spiral oil scraping plate 52, and the outer wall is provided and pumped. The flue gas inlet 53 communicated with the tail end of the air duct 32, the top is provided with a flue gas outlet 54 communicating with the exhaust gas inlet 42 of the flue gas hood 41, and the bottom is connected with the oil water collector 55, and the flue gas and the oily liquid droplets are passed through the exhaust pipe. After entering the oil-water collecting device 5, the liquid droplets are separated from the flue gas by the spiral scraping oil plate 52, enter the oil water collector 55, and the remaining flue gas enters the next-stage flue gas hood 41 through the flue gas outlet 54 to realize the recovery and utilization of petroleum;

The outlet pipe of the flue gas purification device 7 is connected to the chimney through an exhaust fan, and exhausts the purified exhaust gas.

The fresh air distribution inlet of the flue gas device 4 is provided with an air inlet regulating valve, and the opening amount of the fresh air is controlled by controlling the opening degree thereof.

Example 2 Comprehensive Utilization of Oily Sludge with High Moisture Content

Step 1: mixing the oily sludge having a water content of 90% with clam shell, quicklime, biomass charcoal and ferric chloride in a ratio of 70:5:6:10:9 by mass ratio, the clam shell The particle size is 2 mm, the biomass carbon has a particle size of 5 mm, and the calorific value is 5000 kcal;

Step 2: The mixture obtained in the step 1 is sent to the incinerator of the negative pressure circulation heat storage recovery system described in Embodiment 1, the mixture has a thickness of 500 mm, the traveling speed of the mixture is 0.05 m/s, and the ignition is incinerated. The exhaust gas discharged from the flue gas purification device 7 satisfies the EU 2000 standard.

Example 3 Comprehensive Utilization of Oily Sludge with High Moisture Content

Step 1: mixing the oily sludge having a water content of 40% with clam shell, quicklime, biomass charcoal and ferric chloride in a ratio of mass ratio of 80:8:5:3:4 to obtain a mixture of the clam shell The particle size is 8 mm, the biomass carbon has a particle size of 8 mm, and the calorific value is 4,500 kcal;

Step 2: The mixture obtained in the step 1 is sent to the incinerator of the negative pressure circulation heat storage recovery system described in Embodiment 1, the mixture has a thickness of 700 mm, the traveling speed of the mixture is 0.1 m/s, and the ignition is incinerated. The exhaust gas discharged from the flue gas purification device 7 satisfies the EU 2000 standard.

Example 4 Comprehensive Utilization of Oily Sludge with High Moisture Content

Step 1: mixing an oily sludge having a water content of 60% with clam shell, quicklime, biomass carbon, and ferric chloride at a mass ratio of 60:10:10:10:10 to prepare a mixture of the clam shell The particle size is 8 mm, the biomass carbon has a particle size of 8 mm, and the calorific value is 4,500 kcal;

Step 2: The mixture obtained in the step 1 is sent to the incinerator of the negative pressure circulation heat storage recovery system described in Embodiment 1, the thickness of the mixture is 700 mm, the traveling speed of the mixture is 0.2 m/s, and the ignition is incinerated. The exhaust gas discharged from the flue gas purification device 7 satisfies the EU 2000 standard.

Claims

An efficient and comprehensive utilization method of oily sludge with high water content, including the following steps:

Step 1: The oily sludge with a water content of 40%-90% and the crushed material of the crop, quicklime, biomass charcoal, and tempering agent according to the mass ratio of 60-80:5-10:3-5:0-10:2 A mixture of -10 is prepared to obtain a mixture, wherein the crop crushing material is selected from the group consisting of clam shells, straws or corn cobs having a particle size of 2-8 mm, and the biomass carbon has a particle size of 1-8 mm and a calorific value of 4500- 6500 kcal, the tempering agent is a surfactant ferric chloride;

Step 2: The mixture obtained in the step 1 is sent to an incinerator of a negative pressure circulation heat storage recovery system, the mixture has a thickness of 350-700 mm, and the mixed traveling speed is 0-0.2 m/s, and the negative pressure is cyclically stored. The heat recovery system incinerate the harmful substances in the oily sludge, and uses the incineration device to incinerate and preheat the oil to extract the oil from the sludge to realize the recycling of the oil.
The method according to claim 1, wherein the pulverized material of the crop in the step 1 is a clam shell having a particle size of 2-8 mm, and the sludge, the clam shell, the quicklime, the biomass charcoal and the tempering agent are The mass ratio is 60-75:6-10:3-5:2-8:5-10.
The method of claim 1 wherein said mixture in step 2 has a thickness of from 500 to 700 mm.
A negative pressure circulating heat storage recovery system for realizing the method according to any one of claims 1 to 3, comprising a mixing device (1), an incineration device (2), a draft device (3), a flue gas circulation device (4), and oil-water collection The device (5), the conveying device (6) and the flue gas cleaning device (7) are characterized by:

The mixing device (1) comprises a plurality of silos (11), a weighing scale (12), a mixing and agitating device (13); the discharge port of the silo (11) is aligned with the weighing scale (12) The weighing plate of the weighing scale (12) corresponds to the feeding port of the mixing and stirring device (13), and the additive in the silo (11) is weighed by the weighing (12) and then sent to the mixing and stirring device ( 13) mixing the mixture with the high water content oily sludge, connecting the discharge port of the mixing device (13) to the conveying device (6), and feeding the mixture into the incinerator (2) via the conveying device (6);

The incinerator (2) includes a cloth section (20), a drying section (21), an ignition section (22), an incineration section (23) and a cooling section (24) from front to back, and the cloth section (20) A material disperser (25) is disposed, and a preheating cover (26) is disposed above the drying section (21) and the ignition section (22), and an exhaust gas is disposed on the preheating cover corresponding to the position of the ignition section (22) The inlet (27) and the fuel nozzle (28) form a second combustion chamber, and the drying section (21), the ignition section (22), the incineration section (23) and the cooling section (24) are sealed from the air extracting device (3) Connected, the upper portion of the incineration section (23) is sealingly connected to the flue gas circulation system (4);

The air extracting device (3) includes a plurality of air hoods (31), and each of the air hoods (31) is connected to a set of exhaust pipes composed of an air exhaust pipe (32) and an air blower (33). An oil-water collecting device (5) is disposed between the tube (32) and the exhaust fan (33);

The flue gas circulation device (4) comprises a plurality of flue gas hoods (41), each of which is provided with an exhaust gas inlet (42) and a fresh air distribution inlet (43), the flue gas hood The exhaust gas inlet (42) of (41) is in communication with the tail end of the upper-stage exhausting pipe, and the flue gas formed by the decomposition of the harmful substances in the mixed material in the high-temperature incineration enters the exhaust pipe through the draft hood (31) (32) After the flue gas oil and water is separated and collected in the oil-water collecting device (5), the remaining flue gas is sent to the next-stage flue gas hood (41) through the exhaust fan (33) to complete the drying and preheating of the mixture material in the latter stage. The flue gas in the last-stage exhaust pipe connected to the lower part of the incineration section (23) enters the preheating cover (26) through the exhaust gas inlet (27), and is subjected to secondary combustion in the second combustion chamber, and enters the smoke after the advanced treatment. Gas purification device (7);

The outlet pipe of the flue gas purification device (7) is connected to the chimney through an exhaust fan, and exhausts the purified exhaust gas.
The negative pressure cycle heat storage recovery system according to claim 4, wherein the drying section (21) has a length of 1 to 20 m.
The negative pressure cycle heat storage recovery system according to claim 4, wherein said ignition section (22) has a length of 1-6 m.
The negative pressure circulating heat storage recovery system according to claim 4, wherein the incineration section (23) has a length of 4 to 50 m.
The negative pressure circulating heat storage recovery system according to claim 4, characterized in that: the fresh air distribution inlet of the flue gas device (4) is provided with an inlet duct regulating valve, and the opening of the fresh air is controlled by controlling the opening degree thereof. Involvement.
The negative pressure circulating heat storage recovery system according to claim 4, characterized in that the cloth section (20) is provided with a material disperser (25).
The negative pressure circulating heat storage recovery system according to claim 4, wherein a preheating cover (26) from front to back from low to high is provided above the drying section (21) and the ignition section (22). .
The negative pressure circulating heat storage recovery system according to claim 4, wherein a tail end of the exhaust duct communicating with the lower portion of the drying section (21) communicates with the flue gas purification device (7), The end of the exhaust pipe connecting the ignition section (22) and the incineration section (23) is connected to the flue gas circulation device (4), and the outlet of the last-stage exhaust pipe connected to the lower portion of the incineration section (23) The exhaust gas inlet (27) of the preheating hood (26) communicates, and the exhausting conduit communicating with the lower portion of the cooling section (24) communicates with the tail dust removing device.
The negative pressure circulating heat storage recovery system according to claim 4, wherein the oil-water collecting device (5) comprises a cyclone type condensing oil remover (51) having an upper portion having a cylindrical shape and an inverted portion having an inverted cone shape. The cyclone condensing oil remover (51) is internally provided with a spiral scraping plate (52), the outer wall is provided with a flue gas inlet (53) communicating with the tail end of the exhaust pipe (32), and the top is provided with flue gas. The flue gas outlet (54) of the exhaust gas inlet (42) of the cover (41) is connected to the oil water collector (55), and the flue gas and the oily liquid droplets enter the oil water collecting device (5) through the exhaust pipe, and the liquid is contained. The drip spiral scraping oil plate (52) is separated from the flue gas, enters the oil water collector (55), and the remaining flue gas enters the next-stage flue gas hood (41) through the flue gas outlet (54) to realize the petroleum recycling.